UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended March 31, 2021 or Commission File No. 1-15579 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months and (2) ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File No. 1-15579 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 46-4914539 (State or other jurisd ...

MSA Safety Incorporated (NYSE:MSA) Q4 2020 Results Conference Call February 19, 2021 8:30 AM ET Company Participants Elyse Lorenzato - Director, IR Nish Vartanian - Chairman, President and CEO Ken Krause - SVP, CFO and Treasurer Conference Call Participants Stanley Elliott - Stifel Richard Eastman - Baird Lawrence De Maria - William Blair Brendan Popson - CJS Securities Chris McGinnis - Sidoti & Company Operator Good day, and welcome to the MSA Fourth Quarter 2020 Earnings Conference Call. All participants ...

MSA Safety Incorporated (NYSE:MSA) Q3 2020 Results Conference Call October 29, 2020 8:30 AM ET Company Participants Elyse Lorenzato - Director, IR Nish Vartanian - Chairman, President and CEO Ken Krause - SVP, CFO and Treasurer Conference Call Participants Stanley Elliott - Stifel Brendan Popson - CJS Securities Richard Eastman - Robert W. Baird Larry De Maria - William Blair Operator Good day, and welcome to the MSA Third Quarter 2020 Earnings Conference Call. [Operator Instructions] Please note event is b ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended September 30, 2020 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File No. 1-15579 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 46-4914539 (State or other jurisdiction of incorporation or organization) (IRS Employ ...

MSA Safety Incorporated (NYSE:MSA) Q2 2020 Results Earnings Conference Call July 30, 2020 8:30 AM ET Company Participants Elyse Lorenzato - Director, Investor Relations Nish Vartanian - Chairman, President and CEO Ken Krause - Senior Vice President, Chief Financial Officer and Treasurer Conference Call Participants Stanley Elliott - Stifel Richard Eastman - Baird Larry De Maria - William Blair Garo Norian - Palisade Capital Management Operator Good day. And welcome to the MSA Second Quarter 2020 Earnings Co ...

Commission File No. 1-15579 MSA SAFETY INCORPORATED UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended June 30, 2020 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 (Exact name of registrant as specified in its charter) Pennsylvania 46-4914539 (State or other jurisdiction of (IRS Employer Identification No.) incorporation ...

MSA Safety Incorporated (NYSE:MSA) Q1 2020 Earnings Conference Call April 30, 2020 8:30 AM ET Company Participants Elyse Lorenzato - Director, Investor Relations Nish Vartanian - President and CEO Ken Krause - Senior Vice President, CFO, and Treasurer Steven Blanco - Vice President, President MSA Americas Conference Call Participants Stanley Elliott - Stifel Richard Eastman - Robert Baird Larry De Maria - William Blair Edward Marshall - Sidoti Garo Norian - Palisade Capital Management Operator Good day and ...

For the quarter ended March 31, 2020 or UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File No. 1-15579 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) Pennsylvania 46-4914539 (State or other jurisdiction of incorporation or organization) 1000 Cranberry ...

☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2019 OR Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File No. 1-15579 MSA SAFETY INCORPORATED (Exact name of registrant as specified in its charter) (State or other jurisdiction of incorporation ...